Thermally-insulated picnic box



March 31; J. W. WRIGHT THERMALLY INSULATED PICNIC BOX Filed 001;. 12, 922

Patented Mar. 31, 1925.

UNITED STATES I 1,532,015 PATENT OFFICE.

JAMES W. WRIGHT, or Los ANGELES, CALIFORNIA.

THERMALLY-INSU Application filed October 1 citizen of the United States. residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Thermally-Insulated Picnic Boxes, of which thefollowing is a specification. V

This invention relates "to receptacles and more particularly to thermally insulated boxes.

It is an objectof the present invention to provide an extremely simple and inexpensive form of thermally insulated receptacle and more particularly a thermally insulated boxadaptedfor picnic uses and. capable of being readily carried about by hand.

It is another object of the invention to provide a thermally insulated box' of hollow wall construction and which is reinforced so as to be capable of standing considerable external pressure when the wall is vacuumized. l Other objects and advantages will be made manifest in the following specification of an embodiment of the invention illustrated in" the accompanying drawings, wherein:

Figure 1 is a vertical section of the device showing the top in closed position.

Figure 2 is a erspective ofthe device showing the topo osed and fastened.

Fi ure 3 is a perspective of the'box showing the top removed.

The resent thermally insulated box consists of side walls and a bottom all rigidly fastened, the walls haviri inner panels) and an inner bottom 3 which may be of tin or other durable material and the panels and bottom are spaced from anintermediate tin wall 4 by spacing means'consisting of blocks of cork 5, each supported within a acket of I non-heat conductlng property, such, for instance, as fiber tubes 6.

The reinforcing cork blocks 5 are suiticiently closely spaced to form a substantial support for the intermediate wall 4 and the intermediate bottom 5'. The intermed ate walls and intermediate bottom are s urrounded closely by an insulating partit on 6, such as of asbestos, and this insulat ng covering is in turn enclosedm a protecting outer shell 7. The top of the box s 0 on and has a downwardly and inwardly beve ed cork or other seal forming seat 8 upon which may be snugly disposed a cover 10 which is of hollow construction obtained in LATED PICNIC BOX.

2, 1922. Serial no. am.

the manner above described with respect to the walls of the box.

The hollow walls and bottom all form a communicating vacuum space and one of the walls is provided with a valve or .air exhausting block 11 having an exhaust port 12 opening into the vacuum space in the walls. The port 12 is designed to be closed 01f by a valve screw 13 which is run in after a suitable degree of vacuum has been obtained in the vacuum space.

The top 10 is provided with a vacuum block or valve device 11 of the kind above described.

' In Fig. 1 the suction hose H of a vacuum pump is. shown as attached to the vacuum block 11 indicating the manner of exhausting the air from the vacuum space in the top. After the air has been exhaiisfefi the valve screw 13 is then closed and the hoseI-I re' moved.

. Suitable means are provided-for securing I the top 10 in f closing position-and such means is also utilized as a handle for 81177 ing'the box. Such fastening and carryin means is shown as including a handle or ball to the closing position ofFigureZ to bring parts 15 of the. bails togetherand the handle these may then be hooked or clamped in fastening position by hooks 19 turnably mounted on the side arms of the bail so as to lock these arms together.

From the above it will be seen that I have provided an extremely simple and practicable form of thermally insulated box of inexpensive but substantial and efiective construction.

It is understood that the reinforcing blocks or spacers 5 may be of cork or other suitable material having non-heat conductive property, and preferably these blocks are of vegetable matter.

The intermediate asbestos layer 6 between the metallic walls forms not only a heat insulator,"but also a friction spacer or filler between the contiguous metallic plates.

, Further embodiments, modifications and variations may be resorted to within the spirit of the invention as here claimed.

What is claimed is:

of this top being attached t0 dia- A thermally insulated picnic box comprising inner'side walls and a bottom wall all rigidly connected, intermediate side walls and a bottom wall all rigidly connected and spaced from the inner walls and bottom,

blocks of cork having jackets of non-heat conducting material mounted in the space between the inner and intermediatev constructions and evenly distributed to form braces, an insulating partition outside of the intermediate walls and bottom, a- 1'0- tecting outer shell covering the insulation, the container thus constructed being open at the top and having a pocketed beveled edge all the way around, cork in the pocket forming a seat, and a cover adapted to fit the seat. h I p 2. A thermally insulated picnic box comprising inner side walls and a bottom wall rigidly connected, intermediate side walls and a bottom wall all rigidly connected and spaced from the inner walls and bottom,

blocks of cork having jackets of non-heat conducting material mounted in the space- .between the inner and intermediate constructions and evenly distributed to form braces, an insulating partition outside of the intermediate walls and bottom and. a protecting outer shell covering the insulation, the container thus constructed being open at the top and having a pocketed beveled edge all the way around, cork in the pocket forming a seat, a cover adapted to fit theseat, said cover being constructed in the same manner as one, of the sides or bottom and the air being exhausted from the spaces between the inner walls and the intermediate walls.

3. A thermally insulated-picnic box comprising inner side walls and a bottom all rigidly connected, intermediate side walls and a bottom wall all rigidly connected and spaced from the inner walls and bottom,

or bottom and the air being exhausted from the spaces between the inner walls and the intermediate walls, and bails connected to the sides of the box and adapted to be folded up over the cover and fastened in closed position to form'handles and to lock the top' in closed position.

4. A thermally insulated picnic box comprising inner side walls and a bottom wall rigidly connected, intermediate side walls and a bottom wall all rigidly connected and spaced from the inner walls and bottom, blocks of non-heat conducting material mounted iii the space between the inner and intermediate constructions and evenly distributed to form braces, an insulating partition outside of the intermediate walls and bottom and a protectingouter shell covering the insulation, the air being exhausted from the spaces between the inner walls and the intermediate walls, and the container thus constructed being open at the top and having a pocketed beveled edge all the way around, means in the pocket forming a seat, and a cover adapted to lit the seat, said cover being constructed in the same manner as one of the sides or bottom.

In testimony whereof I have signed my name to this specification.

' J. W. WRIGHT. 

